Variable declaration using let in Javascript - Mini Project: Build & Apply

Variable declaration using let

📖 Scenario: Imagine you are organizing a small party and need to keep track of the number of guests coming.

🎯 Goal: You will create a variable to store the number of guests using let, update it, and then display the final count.

📋 What You'll Learn

Create a variable using let with the exact name guestCount

Initialize guestCount with the value 5

Update guestCount by adding 3

Print the final value of guestCount

💡 Why This Matters

🌍 Real World

Keeping track of counts or quantities in programs, like guests, items, or scores.

💼 Career

Understanding variable declaration and updates is fundamental for all programming jobs.

1

Declare the initial variable

Create a variable called guestCount using let and set it to 5.

Javascript

// Your code here

Need a hint?

Use let guestCount = 5; to declare the variable.

2

Update the variable

Add 3 to the existing guestCount variable using the += operator.

Javascript

let guestCount = 5;
// Your code here

Need a hint?

Use guestCount += 3; to add 3 to the current value.

3

Use the variable in a message

Create a new variable called message using let and set it to the string `Total guests: ${guestCount}` using a template literal.

Javascript

let guestCount = 5;
guestCount += 3;
// Your code here

Need a hint?

Use backticks ` and ${guestCount} inside the string.

4

Display the message

Use console.log to print the message variable.

Javascript

let guestCount = 5;
guestCount += 3;
let message = `Total guests: ${guestCount}`;
// Your code here

Need a hint?

Use console.log(message); to show the message in the console.